Approval evidence

Expanded Definition

Approval evidence is the durable proof that an access decision actually happened, not just that a request was opened. In NHI and IAM workflows, it should show the approver, the timestamp, the exact entitlement or exception approved, and the context needed to reconstruct the decision later. That may include system-generated audit logs, approval workflow records, policy references, and linked change identifiers. In practice, the strongest evidence is machine-recorded and tamper-evident, because approval trails built from chat messages or forwarded email are difficult to trust during review.

Definitions vary across vendors on how much metadata is enough, but the operational goal is consistent: approval evidence must support auditability, recertification, and exception handling. It also matters for policy enforcement in frameworks such as the NIST Cybersecurity Framework 2.0, where access governance depends on verifiable decisions rather than informal acknowledgements. For NHI programs, the evidence should be tied to the identity, secret, workload, or privilege being approved, not just to a generic ticket number.

The most common misapplication is treating a ticket status change as approval evidence, which occurs when teams cannot prove who authorised the access or what exact entitlement was approved.

Examples and Use Cases

Implementing approval evidence rigorously often introduces workflow friction, requiring organisations to balance faster access delivery against stronger accountability and replayable audit trails.

• A platform team approves a new service account role in a workflow system, and the record captures the approver, request payload, and policy rule that justified the grant.
• An exception committee authorises a temporary API key extension, with the evidence linked to the expiration date and the compensating control review.
• A recertification campaign confirms that a certificate renewal was approved by the system owner, creating an audit trail for later access review.
• A security team investigates a leaked secret after reading the approval record for the original issuance path, similar to the pattern seen in the JetBrains GitHub plugin token exposure case, where traceability becomes critical after exposure.
• A zero-standing-privilege program records just-in-time access approval with explicit start and end times, then preserves the record for recertification and post-incident review.

Approval evidence is most useful when it is embedded in the authoritative system of record, not reconstructed later from a support queue. That is especially important for service identities and secrets workflows, where approvals can be frequent and short-lived. For a broader NHI context, see NHI Mgmt Group guidance on governance and lifecycle control, and pair it with identity-centred logging practices described by NIST Cybersecurity Framework 2.0.

Why It Matters in NHI Security

Approval evidence is a control boundary, not just paperwork. Without it, organisations cannot reliably prove whether a secret was issued, a privilege was expanded, or an exception was legitimately granted. That creates downstream failures in audit readiness, access recertification, and incident response, especially when the identity involved is a service account, workload identity, or API key rather than a human user. Weak evidence also undermines least privilege because reviewers cannot tell whether a standing entitlement was approved once, renewed repeatedly, or never approved at all.

NHIMG research shows the scale of the underlying problem: 97% of NHIs carry excessive privileges, increasing unauthorised access and broadening the attack surface, according to the Ultimate Guide to NHIs by NHI Mgmt Group. In that environment, approval evidence becomes the only durable way to separate legitimate access from privilege drift. It also supports investigations after secrets are found in unsafe places, such as code or CI/CD systems, a pattern reflected in the broader NHI exposure landscape described in the same guide. Organizations typically encounter the absence of approval evidence only after an access review, audit request, or breach investigation, at which point the term becomes operationally unavoidable to address.

Related resources from NHI Mgmt Group

• What is the difference between access approval and access control evidence?
• What evidence is needed to understand the impact of shadow AI agents?
• When does just-in-time access help most in DORA evidence collection?
• When should organisations require human approval for an AI agent action?